Welcome to the resource topic for 2005/182
Cryptanalysis on Chang-Yang-Hwang Protected Password Change Protocol
Authors: Chih-I Wang, Chun-I Fan, D. J. GuanAbstract:
Recently, Chang et al. proposed an authenticated key agreement
and protected password change scheme.
They claimed that their scheme is simple and efficient.
However, in this letter we point out that their protected password
change protocol is insecure under the denial-of-service attack and the dictionary attack
in some situations.
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